Exam 1 Flashcards
(114 cards)
What are the CNs that innervate the various muscles of the eye?
3, 4, 6 (SO4 LR6 R3)
Which CN causes mydriasis (dilation) and miosis (constriction)?
3
How will the eye respond if CN3 is damaged?
It will go down and out
If a patient has a left afferent papillary defect and you shine a light into the right eye, how will the eyes respond? how about the left eye?
Right eye: both eyes will constrict
Left eye: neither eye will react
What causes an efferent papillary defect to occur?
Trauma causing the impulse from brain to eye via CN3 to be damaged
If the patient’s left eye is affected in an efferent papillary defect, how will it react when hit with light? how about if the right (good eye) is hit with light?
Both will cause the good eye to constrict and the bad eye to no react
Which parts of the eye measure sharpness and is where the light focuses?
Macula and fovea
Pt has hypertension and you notice decreased sharpness w/in the eye around the borders upon ophthalmoscopic exam…what do you expect her to have?
Papilledema
If a patient wakes up and they cannot see at all, what pathology can you expect from an ophthalmoscopic standpoint?
Hyphema - blood in the anterior chamber of the eye that has pooled b/c the patient was laying down
What is the syndrome called when you lose sympathetics to the eye?
Horner’s syndrome
What innervates Mueller’s muscle?
Sympathetics
What are the triad of symptoms involved with loss of innervation to Mueller’s muscle?
Ptosis of eye, Anhydrosis, Miosis
If a patient is experiencing bitemporal hemianopsia (tunnel vision) what happened?
Their optic chiasm was cut
If a patient is experiencing homonymous hemianopsia (cut left, right is blocked out and vice versa), what happened?
Their optic tract was cut
If a patient is experiencing ipsilateral eye blindness?
Their optic nerve was cut (cut left, lose left and vice versa)
What is it called when a patient has increased intraocular pressure?
Glaucoma
What is it called when the lens of the eye is clouded?
Cataract
What is it called when an eye can accommodate, but not respond with direct light?
Argyll Robertson Pupil - like a hooker - often seen in syphillis
What is it called when a patient’s pupils are not equal in size?
Anisocoria
What type of pupils are found in a comatosed or brain dead patient?
Dilated fixed pupils
What type of pupils are common in patients with narcotic issues?
constricted fixed pupils
If a patient has conductive hearing loss, what will the result of a Rinne test be?
BC > AC
If a patient has senseroneurial hearing loss, what will the result of a Rinne test be?
AC > BC
What does the Weber test test?
Lateralization